How does granite resist weathering in outdoor tree boxes compared to marble?

Granite and marble are both popular natural stones used in outdoor applications, but their resistance to weathering differs significantly. Granite, an igneous rock, is highly resistant to weathering due to its dense, interlocking crystal structure and low porosity. This makes it less susceptible to water absorption, freeze-thaw cycles, and chemical erosion, which are common challenges in outdoor environments like tree boxes.

Marble, on the other hand, is a metamorphic rock composed primarily of calcite. While it is elegant and visually appealing, marble is more porous and softer than granite. This makes it prone to etching, staining, and erosion when exposed to acidic rain, pollutants, and temperature fluctuations. Over time, marble in outdoor tree boxes may develop cracks, discoloration, and surface degradation.

In summary, granite's superior durability and resistance to weathering make it a more reliable choice for outdoor tree boxes compared to marble. Its ability to withstand harsh environmental conditions ensures longevity and minimal maintenance, making it a practical and cost-effective option for outdoor installations.